Vignetting-frame



UNITED I STATES PATENT OFFICE.

JOHN M. KELLUM, OF KOKOMO, INDIANA.

VIGNETTING-FRAME.

SPECIFICATION forming part of Letters Application tiled February 8,1889i To @ZZ whom it may concern:

Be it known that I, JOHN IWI. KELLUM, a citizen of the United States,residing at Kokomo, inthe county of Howard and State of Indiana, haveinvented certain new and useful Improvements in Vignetting-Frames, ofwhich the following is a specification.

The object of my said invention is to provide a vignetting-frameespecially designed for photographers use, which can be convenientlyadjusted to any desired position on the printing-frame, and by the useof which the process is rendered very simple and inet pensive, as willbe hereinafter more fully de scribed and claimed.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figurel is a perspective view of a vignetting-rame embodying my said inventionin position for use upon an ordinary printingdrame; Fig. 2, a centrallongitudinal section through the same on the dotted line 2 2 in Fig. 3,and Fig. 3 a cross-section on the dotted line 3 3 in Fig. 2.

In said drawings, the portions marked A represent the printingdranie; B,the main portion ot the vignettingframe; O, the sliding portion, and E ashade or light-softener for use when the light is too intense.

The printing-fra1ne A is of an ordinary construction, and needs nospecial description, except incidentally in describing my saidinvention. A negative A is shown in position for taking a print, andset-screws a are provided. centrally in each endv of the frame for thepurpose of securing the frame I3 thereon, as will be presentlydescribed.

The frame B is a rectangular trame of substantially the same shape andsize as the printing-frame with which it is to be used. It preferablyconsists of a piece of thin board having a central aperture arranged tobe above the negative when in use. It is provided in each end or sidewith long transverse slots Z), through which the setserews a extend intothe frame A and secure said frame B in the desired position. On oppositesides of the central aperture in the frame B are provided cleats B',which entend longitudi nally of said frame, and have two sets of groovesb and b2 in their adjacent sides, in

Patent No. 412,511, dated October 8, 1889.

Serial No. 299,157. (No model.)

which are mounted the sliding part C and the shade D, as will bepresently described.

The sliding part O is any suitable card formed to tit between the cleatsB and slide in the grooves h or b2, as maybe desired,and is providedwith a central aperture of the shape and size desired, through whichlight is admitted to the printing-frame.

The shade E consists of an outer frame, formed to slide in one set ofthe grooves in the cleats I3', and a central portion of tissuepaper orsimilar substance, of such thickness or density as may be necessary.

The use of my invention is as follows: The negative from which a printis to be taken is arranged in the printing-frame in the well knownmanner. The vi gnetting-frame is then secured in position on the side ofsaid frame, through which the light is admitted, by means of the slotsand set-screws, as described. The sliding portion O, having an apertureof the desired size and fornuis then mounted in the grooves b in thecleats B', and the lframe adj usted to the exact position desired abovethe negative, which adjustment is permitted by means of the set-screws aand slots b, said frame being moved, as may be desired, either as awhole to one side or the other, or the opposite ends maybe slid inopposite directions, to bring the vignetting-frame into a diagonalposition in the printing-frame, as indicated by dotted lines in Fig. l,and thus permit various effects to be produced easily and conveniently,lVhen the vignetting-franie has been adjusted to the desired position,the print is taken in the welhknown manner. When the light in which theexposureis made is too strong for the purpose, the shade E, the centralportion of which is composed of paper or other substance of the desireddensity, is slid into position in the grooves b2, and the light thusmodified as desireda To produce some effects, it is desired that thevignettingframe shall be at a greater distance from the negative than inothers, and in such cases the sliding part C is withdrawn from thegrooves b and mounted in the grooves b2, which achieves the desiredresult.

Having thus fully described my said inven tion, whatI claim as new, anddesire to secure by Letters Patent,

l. A vignettingrame cousistin g oit the main IOC portion B, providedwith a central aperture, the slides B on each side thereof, having thet-Wo sets of grooves b b2 formed therein, the sliding part C, mounted in011e set of grooves, and the shade E, mounted in the other set,substantially as set forth.

2. The combination of the printing-frame A, the vignetting-frame B,provided with the transverse slot bin each end thereof, the setscrews a,one extending through each of said vslots into said printingframe, andthe sliding part C, mounted in slides over an aperture in saidvignetting-frame, substantially as set forth.

In witness whereof I have hereunto set my i 5 hand and seal, atIndianapolis, Indiana, this 4th day of February, A. D. 1889.

JOHN M. KELLUM. [11s.]

Witnesses:

H. GEORGE, E. W. BRADFORD.

